Amazon is selling a bracelet that shocks you if you spend too much money or eat too much fast food

Amazon is now selling a wrist strap that uses a small electric current to "zap" you into giving up bad habits.

The black bracelet, which retails for £200 ($250), has 150 zaps per charge, which means the battery should last a good few days, depending on how "naughty" you've been.

Credit: Amazon

"Pavlok allows you to speak your reptile brain’s language by adding an unpleasant element (a safe and harmless ‘zap’ of electricity on your wrist) to what you have been taught to love (your nasty lingering habit)," reads the description of the Pavlok 2 on Amazon. "Quickly conditioning your mind to associate an “unpleasant” feeling with your bad habit… and stopping it all together."

And the reviews are mixed. While many critiqued the design and quality of the product, others concluded that it is helpful when it comes to breaking minor "bad" habits.

"Wrist band is a little awkward but it does allow for the contacts to be positioned closely to your skin for the best results. I’ve only used the button on the device to administer the shock. I can’t comment on how the hand motion function works. The app is ok and does give some information and videos on how to beat whatever habbit you’re trying to break. At 100% on a decent charge it is more than enough of a zap to get your attention. I’m glad I bought it, so far I believe it is working. It’s not going to cure a lifelong issue in a few days so you have to stick to their plan and really work on it," wrote one customer.

Credit: Pavlok 2

Another said it was helpful when used as an alarm:

"I have tried a few devices to help me wake early for success without interrupting my wife's beauty sleep. This one I have to say is the best so far. I am able to wake up and get moving quietly. I turn off the sound alarm and turn the shock on about 60% and the vibrate on 100% and it works like a charge if the vibration doesn't wake me the shock will. Not only that but I have the ability with My iPhone to monitor my sleep patterns with Sleep tracking. Truly a great product even though they never got a deal on Shark Tank! LOL. It can help you get rid of bad habits but I have not used this functionality as of yet. I do wish they made the simulated watch band with a better quality."

This article originally appeared on VT.co